Possible the best thing i've ever seen.All the fear of the cold water and ability to snorkel disappeared immediately. The suits given help you float so no real effort needed. Although do wear thick socks. Our guides was dori (sorry if spelt wrong) and sarah. Both were very nice people and great help

Problem is your not gaurunteed to see the lights. Although our tough guide gave us an amazing insight into iceland. Very knowledgeable and you could tell how much she loved her country. But as i said i didnt see the lights. Nature is very unpredictable